Operating instructions

7-1
SECTION VII
ASSEMBLY OF SUBASSEMBLIES
7-1. NEW PARTS. Parts which require protection
from atmospheric dust and moisture are wrapped or
boxed individually or in sets. These should not be
unpacked until they are ready to be installed. This is
especially true of precision bearing inserts and anti-
friction bearings. Check other new parts on receipt for
damage done in transit. Refer to Section IV of the
parts catalog, Form X-30040A, for part numbers of
the complete gasket set, the main bearing set, the
piston ring set and tubes of light weight Tite-Seal
gasket paste, all of which should be on hand when
work is started. Use only new shakeproof or split
lockwashers, tab washers, elastic stop nuts, cotter pins
and annealed, corrosion-resistant lockwire.
7-2. TIGHTENING TORQUES. The Table of
Limits in Section VI contains tightening torques for
bolts, nuts and plugs lubricated with castor oil. The
accuracy of any torque indicating wrench depends on
a smooth application of force. Do not back up a nut or
bolt and leave it in that condition. If part is
accidentally tightened too much, loosen it and
retighten it to a value within the specified limits. If a
nut slot cannot be aligned with a cotter pin hole within
the specified limits, substitute another serviceable nut.
If the cotter pin hole in stud lies beyond the nut slots
when the nut has been tightened properly, the stud has
been improperly installed or has backed out, or the
attached part has been reduced in thickness, or either
nut or washer is incorrect part for that location. The
situation must be corrected by whatever replacement
is indicated by inspection.
7-3. FINAL CLEANING. Immediately before
assembling a group of parts they should be washed in,
or sprayed with, a clean solvent and dried with
dehydrated compressed air.
7-4. LUBRICATION. Immediately after final
cleaning and before installation, coat all bare steel
surfaces and journals with clean engine lubricating oil,
except where special lubricants are mentioned in the
text. In some instances where gears and other running
parts are accessible after assembly in a housing,
additional oil should be applied to assure full
coverage. Before installing tapered pipe plugs or
straight thread plugs, to prevent seizure and leakage of
oil, coat the male threads with Snap-On Tool
Corporation anti-seize compound "Never-Seez". Coat
both sides of gaskets with light weight tight seal
compound to assure a perfect seal and to counteract
the permanent "set" caused by compression.
7-5. SPECIFIC ASSEMBLY OPERATIONS.
7-6. OIL PUMP ASSEMBLY -INTEGRAL TYPE
SCREEN (See Figure 4-18).
a. Install by-pass valve assembly (46 through 49)
using new gasket (47). Install adjusting screw (42) in
housing (40) until 13/16 inch of screw shows above
housing. Secure with copper washer (39) and nut
(38). Install gasket (41), washer spring seat (45),
spring (44) and plunger (43) and screw assembly into
housing (4).
b. Slide a new gasket (7) over oil screen (6) and insert
filter into its chamber in pump housing. Tighten it by
hand only.
c. Install pump drive and driven gears (34,36) in
housing chambers, and place bevel gear (33) on end of
drive shaft (34). Apply permatex and silk thread to
parting surface.
d. Install new oil seal (15) in tachometer drive
housing (12). Install new gasket (13). Carefully work
lip of oil seal over shaftgear (14) and push shaft
through.
e. Hold gear end of tachometer drive shaftgear (14)
up and insert shaftgear into cover (11). Screw housing
(12) into cover hand tight only, keeping bevel gear
upward.